Wireshark Capture

iwan@rpi2-1:~$ sudo tshark -f "port 80" -i eth0 -w /tmp/capture-18-06-15-1542.cap
[sudo] password for iwan:
tshark: Lua: Error during loading:
[string "/usr/share/wireshark/init.lua"]:46: dofile has been disabled due to running Wireshark as superuser.
See http://wiki.wireshark.org/CaptureSetup/CapturePrivileges for help in running Wireshark as an unprivileged user.
Running as user "root" and group "root". This could be dangerous.
Capturing on 'eth0'
1027
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